[Not enough is known about solid geometry] and for two reasons: in the first place, no government places value on it; this leads to a lack of energy in the pursuit of it, and it is difficult. In the second place, students cannot learn it unless they have a teacher. But then a teacher can hardly be found.
The human race will have no respite from evils until those who are really philosophers acquire political power or until, through some divine dispensation, those who rule and have political authority in the cities become real philosophers.
Even the good artisans fell into the same error as the poets; because they were good workmen they thought that they also knew all sorts of high matters, and this defect in them overshadowed their wisdom.
A democracy is a state in which the poor, gaining the upper hand, kill some and banish others, and then divide the offices among the remaining citizens equally, usually by lot.
And a democracy, I suppose, comes into being when the poor, winning the victory, put to death some of the other party, drive out others, and grant the rest of the citizens an equal share in both citizenship and offices.
And tell him it's quite true that the best of the philosophers are of no use to their fellows; but that he should blame, not the philosophers, but those who fail to make use of them.
In politics we presume that everyone who knows how to get votes knows how to administer a city or a state. When we are ill... we do not ask for the handsomest physician, or the most eloquent one.